I found the Community "Ask men over 30"! There are some good questions I also asked myself. But looking at the answer count, it seems that there are no men over 30 on Lemmy... #fedivoyage
I seeing some meta discussions about lemmy in general and about lemmy in comparison to reddit. It seems that (survivorship bias!) people on lemmy consider the atmosphere on lemmy more pleasant. Example: https://feddit.de/post/1948030